<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<!-- 块1的右边的margin为10px -->
<span style="margin-right: 10px">行1</span>
<!-- 块2的左边的margin为10px -->
<span style="margin-left: 10px">行2</span>
</body>
</html>